Release

parachute

is the one purchase where keeping the receipt in case the product’s faulty is probably unnecessary.

Buying a parachute: the one time that keeping the receipt in case the product’s faulty is probably unnecessary.

is not needed to skydive unless you want to skydive twice.

You don’t need a parachute to skydive. You only need a parachute to skydive twice.

is a device that makes it possible to walk back from an airplane ride

is the most suspicious thing you can bring onto an airplane.